EP0139461A3 - Improvements relating to optical receivers - Google Patents

Improvements relating to optical receivers Download PDF

Info

Publication number
EP0139461A3
EP0139461A3 EP84306209A EP84306209A EP0139461A3 EP 0139461 A3 EP0139461 A3 EP 0139461A3 EP 84306209 A EP84306209 A EP 84306209A EP 84306209 A EP84306209 A EP 84306209A EP 0139461 A3 EP0139461 A3 EP 0139461A3
Authority
EP
European Patent Office
Prior art keywords
improvements relating
optical receivers
receivers
optical
relating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84306209A
Other versions
EP0139461B1 (en
EP0139461A2 (en
Inventor
William James Stewart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GPT Ltd
Original Assignee
Plessey Overseas Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB838325552A external-priority patent/GB8325552D0/en
Priority claimed from GB838331299A external-priority patent/GB8331299D0/en
Application filed by Plessey Overseas Ltd filed Critical Plessey Overseas Ltd
Priority to AT84306209T priority Critical patent/ATE64673T1/en
Publication of EP0139461A2 publication Critical patent/EP0139461A2/en
Publication of EP0139461A3 publication Critical patent/EP0139461A3/en
Application granted granted Critical
Publication of EP0139461B1 publication Critical patent/EP0139461B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/61—Coherent receivers
    • H04B10/63—Homodyne, i.e. coherent receivers where the local oscillator is locked in frequency and phase to the carrier signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/223—Demodulation in the optical domain

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
EP84306209A 1983-09-23 1984-09-10 Improvements relating to optical receivers Expired EP0139461B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84306209T ATE64673T1 (en) 1983-09-23 1984-09-10 OPTICAL RECEIVERS.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8325552 1983-09-23
GB838325552A GB8325552D0 (en) 1983-09-23 1983-09-23 Optical detection systems
GB838331299A GB8331299D0 (en) 1983-11-23 1983-11-23 Optical receivers
GB8331299 1983-11-23

Publications (3)

Publication Number Publication Date
EP0139461A2 EP0139461A2 (en) 1985-05-02
EP0139461A3 true EP0139461A3 (en) 1988-05-04
EP0139461B1 EP0139461B1 (en) 1991-06-19

Family

ID=26286870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84306209A Expired EP0139461B1 (en) 1983-09-23 1984-09-10 Improvements relating to optical receivers

Country Status (3)

Country Link
US (1) US4648134A (en)
EP (1) EP0139461B1 (en)
DE (1) DE3484728D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783852A (en) * 1985-09-18 1988-11-08 Siemens Aktiengesellschaft Method and apparatus for acquiring information using a relative phase deviation of the optical signal of a local oscillator of a homodyne receiver
US4824201A (en) * 1987-07-13 1989-04-25 Bell Communications Research, Inc. Simultaneous transmission of LED and laser signals over single mode fiber
JPH01123538A (en) * 1987-11-07 1989-05-16 Nec Corp Light balance transmitting circuit
US6486958B1 (en) * 2001-04-24 2002-11-26 Agilent Technologies, Inc. Method and system for optical spectrum analysis with matched filter detection
US6900942B2 (en) * 2002-08-20 2005-05-31 Veridian Systems Wide field-of-view (FOV) coherent beam combiner/detector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320013A (en) * 1963-06-03 1967-05-16 Rca Corp Selectively controllable light guide apparatus
US3353896A (en) * 1963-06-12 1967-11-21 Rca Corp Light frequency shifter

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
IEEE JOURNAL OF QUANTUM ELECTRONICS, vol. QE-14, no. 8, August 1978, pages 577-580, IEEE, New York, US; P.S. CROSS et al.: "Optically controlled two channel integrated-optical switch" *
IEEE TRANSACTIONS ON COMMUNICATIONS, vol. COM-31, no. 8, August 1983, pages 1000-1002, IEEE, New York, US; H.K. PHILIPP et al.: "Costas loop experiments for a 10.6 mum communications receiver" *
THE RADIO AND ELECTRONIC ENGINEER, vol. 46, no. 11, November 1976, pages 543-548, London, GB; R.C. FRENCH: "Error performance of p.s.k. and f.f.s.k. subcarrier data demodulators" *

Also Published As

Publication number Publication date
US4648134A (en) 1987-03-03
EP0139461B1 (en) 1991-06-19
EP0139461A2 (en) 1985-05-02
DE3484728D1 (en) 1991-07-25

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